Caster-frame



(No Model H. G. HART.

GASTER FRAME.

Patented May 29, 1888.

411 120m bo v.

w CW

UN TED STATES PATENT Cr mea.

HUBERT C. HART, OF'UNIONVILLE, CONNECTICUT.

-CASTER-FRAME.

SPECIFICATION forming part of Letters Patent No. 383,525, dated May 29, 1888.

Application filed November 16, 1887. Serial No. 255,317. (No model.)

To all whom it may concern.-

Be it known that I, HUBER'I C. HART, residing at Unionville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Caster- Frames; and I do declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to an improvement in caster frames and in blanks for producing them, the object being to produce acheap, light, strong, and durable frame.

With these ends in view myinvention consists in a sheet-metal caster-frame having its pintle and yokearms made in one piece, the inner portions of the latter being bent away from each other to make room for the easterwheel between them.

My invention further consists in a blank consisting of a tapering shank and two curved arms, respectively projecting outward from the opposite edges of the widest end of the shank.

My invention further consists in certain details of construction, as will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in inside elevation of a blank made in accordance with my invention, and Fig. 2 is a perspective view ofa caster'frameformcd from such a blank.

My improved blank is made ofa single piece of sheet metal, and consists of a tapering shank, A, rounded at its upper end, and of two arms, 13 B, curved downwardly at their outer ends and respectively projecting outward from the opposite edges of the widest end of the shank. As herein shown, the blank is developed for folding and is thereto struck up to form a continuous corrugation,C,extending across the lower end of the shank and extending into and terminating just within the outer ends of the said arms B B. The blank is also stamped to form a retaining-spring, D, from its shank, and to form perforations E E in the outer ends of its arms to receive the pin carrying the caster-wheel. A blank so shaped and developed is folded to bring the edges of its shank and the inner ends of its arms together in the same line, and bent so as to cause the inner portions of the arms to extend away from each other in opposite directions, as at F F, to make room between them for the caster-wheel and to bring their longer outer portions into parallelism. By folding and bending the blank, as described, a caster-frame having a tapering, tubular, corrugated pintle, G, and perforated corrugated yoke-arms H H, is formed. Such a casterframe is stiff and light, easy to finish, fit up, and apply, and is capable of being produced at a low cost for stock, labor, and tools.

I would have it understood that I do not limit myself to the exact construction shown and described, but hold myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention.

I am aware that a cast-metal caster having its pintle and yoke'arms made in one piece is not new. I am also awarethat a caster having its yokearms made of sheet metal is not new. I do not therefore broadly claim a cas ter having its pintle and yoke-arms made in one piece, or a caster having sheet-metal yokearms, but only a sheet-metal caster made substantially as herein shown and described.

Having fully described my inventiomwhat I claim as new, and desire to secure by Letters Patent, is-

1. A sheet-metal caster-frame having its pintle and yoke-arms made in one piece, and the inner portions of the latter bent away from each other to make room for the casterwheel between them, substantially as set forth.

2. A sheet-metal caster-frame having a retaining-spring struck up from the metal forming its pintle,which is formed in one piece with the yoke-arms of the frame, substantially as set forth.

3. A sheet-metal caster-frame having a stiffening corrugation formed in the lower end of its pintle, which is made in one piece with the yoke'arms, substantially as set forth.

4. A sheet-metal caster-frame having a continuous stiffening corrugation encircling the lower end ofiits pintle and extending into and terminating within the outer ends of its yoke-arms, which are made in one piece with In testimony whereof I have signed this the pintle, substantially as set forth. specification in the presence of two subscrib- 5. A blank fora sheet-metal caster-frame, ing witnesses. consisting of a tapering shank and two curved HUBERT O. HART. 5 arms, respectively projecting outward from Witnesses:

the opposite edges of the widest end of the CHAS. B. SHUMWAY, shank, substantially as set forth. EDWARD H. ROGERS. 

